The long-awaited end to this taxing election season comes this week when voters head to the polls on Tuesday.

Current polls indicate Democratic presidential candidate Hillary Clinton has a slight advantage in battleground states and a wider path to winning the Electoral College over Republican presidential candidate Donald Trump.

At least 33 million votes have already been cast in early voting in 37 states, around 25% of the expected total turnout. Early voting has so far favored Clinton.

But the uneasiness that has pervaded financial markets could continue whatever the election outcome.

"Uncertainty is likely to continue after the election," Dan North, chief economist at Euler Hermes North America, told TheStreet. "No matter who wins the presidency, they will almost certainly face an uncooperative Congress."

There are a number of plausible outcomes come Tuesday night, North noted. First, the GOP party could lose control of the Senate, creating a divided Congress. Second, the GOP could hold control in the House and the Senate -- both Clinton and Trump would still face considerable challenges from a gridlocked Capitol Hill.

"In each case political gridlock is the result, and this ugly, divisive, polarizing gridlock has been in place for years," added North. "This situation will require the art of compromise that has been so sorely missing in Washington for years, and the likelihood of that happening is a true uncertainty."

Wall Street has so far reacted positively to any news of a likely Clinton win and negatively to higher chances of a Trump win. Last week, 370 economists, including eight Nobel laureates, signed a letter calling Trump a "dangerous, destructive choice." The group brutalized Trump's economic and budget plans and criticized him for touting "magical thinking and conspiracy theories over sober assessments of feasible economic policy options."

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